H- and A-shares have surged for days after China unrolled economic stimulus. A new exchange-traded fund (ETF) capturing China's largest technology companies arrived the Wall Street on Thursday. The Roundhill China Dragons ETF (DRAG.US) tracks an equal-weighted basket of 5-10 of the largest Chinese techs. The issuer refers to this group of mainland techs collectively as “China Dragons”, including Tencent (TCEHY.US) , Pinduoduo (PDD.US) , Alibaba (BABA.US) , Meituan (MPNGY.US) , BYD (BYDDY.US) , Xiaomi (XIACY.US) , JD.com (JD.US) , Baidu (BIDU.US) and NetEase (NTES.US) .The difference between the “China Dragons” ETF and other ETFs that offer exposure to China is the concentration, said Dave Mazza, CEO of Roundhill Investments, and the ETF's expense ratio of 0.59% is rather cheap.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)Related NewsBOCOMI Hikes TENCENT TP to $513, Keeps Forecast of Profit Growth Outpacing Revenue Growth